我有三个表，mess_stock、mess_voucher、add_grocery。
Mess_stock 表如下，
+-----+------------+-----------------+-----------------+--------+---------+---------+------------+----------+
| sno | voucher_id | particular_name | opening_balance | inward | outward | balance | pay_amount | pay_type |
+-----+------------+-----------------+-----------------+--------+---------+---------+------------+----------+
| 49 | 5 | 4 | 100 | 10 | 100 | 10 | 10.00 | 1 |
| 50 | 17 | 5 | 111 | 10 | 20 | 101 | 60.00 | 1 |
| 51 | 7 | 3 | 123 | 2 | 1 | 124 | 300.00 | 1 |
| 52 | 7 | 1 | 123 | 20 | 20 | 123 | 500.00 | 2 |
| 53 | 14 | 8 | 100 | 5 | 95 | 10 | 60.00 | 2 |
+-----+------------+-----------------+-----------------+--------+---------+---------+------------+----------+
Mess_voucher 表如下
+------------+--------------+--------------+
| voucher_id | voucher_name | voucher_date |
+------------+--------------+--------------+
| 5 | VG1001 | 2015-02-19 |
| 6 | VG1001 | 2015-02-20 |
| 7 | VG1002 | 2015-02-20 |
| 8 | VG1002 | 2015-02-19 |
| 9 | MS1001 | 2015-02-20 |
| 10 | VG10012 | 2015-02-19 |
| 11 | 0 | 2015-02-23 |
| 12 | 1 | 2015-02-24 |
| 13 | MS1001 | 2015-02-25 |
| 14 | MS1001 | 2015-02-28 |
| 15 | VG1003 | 2015-02-28 |
| 16 | MS1001 | 2015-02-19 |
| 17 | MS1001 | 2015-02-21 |
+------------+--------------+--------------+
Add_grocery 表如下
+-----+-----------------+------------------+
| sno | particular_name | particular_price |
+-----+-----------------+------------------+
| 1 | Rice | 25.00 |
| 3 | Mango | 150.00 |
| 4 | Coconut | 22.00 |
| 5 | Banana | 6.00 |
| 6 | Raddish | 12.00 |
| 7 | Apple | 150.00 |
| 8 | Pumkin | 12.00 |
+-----+-----------------+------------------+
我想对mess_stock表的pay_amount总和进行分组。我使用了以下查询
SELECT opening_balance AS ope_stock,
balance AS clo_stock,
SUM(IF(pay_type = 1, pay_amount, 0)) mess_pay,
SUM(IF(pay_type=2, pay_amount, 0)) est_pay
FROM mess_stock;
效果很好。 special_name是add_grocery表的自增id。我需要进出境总额。例如，传入金额 10 意味着它必须使用 mess_stock 中提供的 pspecial_name 从 add_grocery 获取 pspecial_price表，同样我需要所有的答案。我想按日期排序。条目日期存储在连接到 mess_stock 表的 mess_voucher 表中。
最佳答案
试试这个，它会起作用:
使用内连接:
SELECT t2.`particular_name`,t1.`inward`,t1.`outward`,t2.`particular_price`,t3.`voucher_date` from Mess_stock t1 JOIN Add_grocery t2 ON t1.`particular_name`=t2.`sno` JOIN Mess_voucher t3 ON t3.`voucher_id`=t1.`voucher_id` ORDER BY t3.`voucher_date` DESC
关于mysql - SQL 连接三个表并拆分为列，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28672948/